Add CXX API for MatchaTTS models (#1676)

.github/workflows/cxx-api.yaml

@@ -83,6 +83,61 @@ jobs:
             otool -L ./install/lib/libsherpa-onnx-cxx-api.dylib
           fi
 
+      - name: Test Matcha TTS (zh)
+        shell: bash
+        run: |
+          g++ -std=c++17 -o matcha-tts-zh-cxx-api ./cxx-api-examples/matcha-tts-zh-cxx-api.cc \
+            -I ./build/install/include \
+            -L ./build/install/lib/ \
+            -l sherpa-onnx-cxx-api \
+            -l sherpa-onnx-c-api \
+            -l onnxruntime
+
+          curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/matcha-icefall-zh-baker.tar.bz2
+          tar xvf matcha-icefall-zh-baker.tar.bz2
+          rm matcha-icefall-zh-baker.tar.bz2
+
+          curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/vocoder-models/hifigan_v2.onnx
+
+          export LD_LIBRARY_PATH=$PWD/build/install/lib:$LD_LIBRARY_PATH
+          export DYLD_LIBRARY_PATH=$PWD/build/install/lib:$DYLD_LIBRARY_PATH
+
+          ./matcha-tts-zh-cxx-api
+
+          rm -rf matcha-icefall-*
+          rm hifigan_v2.onnx
+          rm matcha-tts-zh-cxx-api
+
+      - name: Test Matcha TTS (en)
+        shell: bash
+        run: |
+          g++ -std=c++17 -o matcha-tts-en-cxx-api ./cxx-api-examples/matcha-tts-en-cxx-api.cc \
+            -I ./build/install/include \
+            -L ./build/install/lib/ \
+            -l sherpa-onnx-cxx-api \
+            -l sherpa-onnx-c-api \
+            -l onnxruntime
+
+          curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/matcha-icefall-en_US-ljspeech.tar.bz2
+          tar xvf matcha-icefall-en_US-ljspeech.tar.bz2
+          rm matcha-icefall-en_US-ljspeech.tar.bz2
+
+          curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/vocoder-models/hifigan_v2.onnx
+
+          export LD_LIBRARY_PATH=$PWD/build/install/lib:$LD_LIBRARY_PATH
+          export DYLD_LIBRARY_PATH=$PWD/build/install/lib:$DYLD_LIBRARY_PATH
+
+          ./matcha-tts-en-cxx-api
+
+          rm matcha-tts-en-cxx-api
+          rm -rf matcha-icefall-*
+          rm hifigan_v2.onnx
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: matcha-tts-${{ matrix.os }}
+          path: ./generated-matcha-*.wav
+
       - name: Test Moonshine tiny
         shell: bash
         run: |